A group of off-duty junior doctors and medical students take a trip to the island of Fetlar. With almost perpetual daylight, they are looking forward to a midnight swim.

Jean, the community nurse on the little archipelago of Out Skerries, is out on her rounds seeing patients and delivering medicine as a one-woman health service.

Occupational therapist Marc Beswick returns to long-term patient Summer, a four-year-old with a condition that means it's hard for her to move her arms and legs.